Thank you for letting me know. I would like to take a closer look with our utility called PlugDebug to rule out USB host controller failure in your system. Please contact me directly at firstname.lastname@example.org and use “Ticket #91213” as a subject for reference to this conversation.
Please head over to -> http://plugable.com/support/plugdebug. There you will find a download link as well as instructions. Please be sure to have the display adapter plugged in and attached to the monitor when running this tool and attach the resulting zip file in the reply to this email. Once we have the .zip file it generates, we will get a better idea of how to best proceed.